//package Single.static
//
//public class Singleton {
//    private static class SingletonHolder {
//    private static final Singleton INSTANCE = new Singleton();
//    }
//    private Singleton (){}
//    public static final Singleton getInstance() {
//        return SingletonHolder.INSTANCE;
//    }
//}public enum Singleton {
//    INSTANCE;
//    public void whateverMethod() {
//    }
//}